Stacked solid electrolytic capacitor with multi-pin structure

ABSTRACT

A stacked solid electrolytic capacitor with positive multi-pin structure includes a plurality of capacitor units, a substrate unit and a package unit. The positive electrode of each capacitor unit has a positive pin extended outwards therefrom. The positive pins are divided into a plurality of positive pin units that are separated from each other and electrically stacked onto each other. The negative electrode of each capacitor unit has a negative pin extended outwards therefrom. The negative pins are divided into a plurality of negative pin units. The negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other. The substrate unit has a positive guiding substrate electrically connected to the positive pins and a negative guiding substrate electrically connected to the negative pins. The package unit covers the capacitor units and one part of the substrate unit.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a stacked solid electrolytic capacitor, in particular, to a stacked solid electrolytic capacitor with multi-pin structure.

2. Description of Related Art

Various applications of capacitors include home appliances, computer motherboards and peripherals, power supplies, communication products and automobiles. The capacitors are mainly used to provide filtering, bypassing, rectifying, coupling, blocking or transforming function, which play an important role in the electric and electronic products. There are different capacitors, such as aluminum electrolytic capacitors, tantalum electrolytic capacitors or laminated ceramic capacitors, in different utilization.

A typical aluminum electrolytic capacitor includes an anode foil and a cathode foil processed by surface-enlargement and/or formation treatments. The surface-enlargement treatment is performed by etching a high purity aluminum foil to increase its surface area so that a high capacitor can be obtained to achieve miniaturized electrolytic capacitor. The anode aluminum foil is then subjected to the formation treatment to form a dielectric surface film. A thickness of the dielectric film is related to a supply voltage of the electrolytic capacitor. Normally the cathode foil will be subjected to the formation treatment, too. However, if no formation treatment on the cathode foil, an oxide film layer will be still formed on the surface when exposed in the air. After cutting to a specific size according to design spec., a laminate made up of the anode foil, the cathode foil which is opposed to the dielectric film of the anode foil and has etched surfaces, and a separator interposed between the anode and cathode foils, is wound to provide an element. The wound element does not have any electric characteristic of the electrolytic capacitor yet until completely dipped in an electrolytic solution for driving and housed in a metallic sheathed package in cylindrical form with a closed-end equipping a releaser. Furthermore, a sealing member made of elastic rubber is inserted into an open-end section of the sheathed package, and the open-end section of the sheathed package is sealed by drawing, whereby an aluminum electrolytic capacitor is constituted.

In fact, the electrolytic capacitor utilizes the mobility of ions in the electrolytic solution to obtain an electric circuit; therefore, the electrical conductivity of the electrolytic solution is an important factor for deciding performance of the electrolytic capacitor. Such that, it is an issue for how to promote the electrical conductivity of the electrolytic solution to maintain the electrolytic capacitor with high-temperature stability on the solution, the aluminum foils, the separator and etc., especially the stability of the solution and the aluminum foils. A typical electrolytic solution for a conventional electrolytic capacitor, especially for those electrolytic capacitors work on a supply voltage under 100V, includes water, organic solvent, organic acid, inorganic acid and some special additives mixed in different proportions.

Moreover, because solid electrolytic capacitor has the advantages of small size, large capacitor and good frequency characteristic, it can be used as a decoupling element in the power circuit of a central processing unit (CPU). In general, a plurality of capacitor elements is stacked together to form a solid electrolytic capacitor with a high capacitor. In addition, the solid electrolytic capacitor of the prior art includes a plurality of capacitor elements and a lead frame. Each capacitor element includes an anode part, a cathode part and an insulating part. The insulating part electrically insulates the anode part and the cathode part from each other. More specifically, the cathode parts of the capacitor elements are stacked over one another. Furthermore, conductive layers are disposed between adjacent capacitor elements so that the capacitor elements are electrically connected to one another.

Furthermore, the winding capacitor includes a capacitor element, a packaging material, and a sealing material. The capacitor element has an anode foil coupled to an anode terminal, a cathode foil coupled to a cathode terminal, a separator, and an electrolyte layer. The anode foil, the cathode foil and the separator are rolled together. The separator is between the anode foil and the cathode foil. The electrolyte layer is formed between the anode foil and the cathode foil. The packaging material has an opening and packages the capacitor element. The sealing material has a through hole where the anode terminal and the cathode terminal pass through and seals the opening of the packaging material. A given space is provided between the sealing material and the capacitor element. A stopper for securing the space is provided on at least one of the anode terminal and the cathode terminal.

SUMMARY OF THE INVENTION

In view of the aforementioned issues, the present invention provides a stacked solid electrolytic capacitor with multi-pin structure. The stacked solid electrolytic capacitor of the present invention has the following advantages:

1. Large area, large capacity, low profile and low cost.

2. The LC (Leakage Current) and the phenomenon of the short circuit are decreased.

3. The soldering difficulty and the ESR (Equivalent Series Resistance) are decreased.

To achieve the above-mentioned objectives, the present invention provides a stacked solid electrolytic capacitor with multi-pin structure, including: a plurality of capacitor units, a substrate unit and a package unit. Each capacitor unit has a positive electrode that has a positive pin extended outwards therefrom, the positive pins of the capacitor units are divided into a plurality of positive pin units that are separated from each other, and the positive pins of each positive pin unit are electrically stacked onto each other. Each capacitor unit has a negative electrode that has a negative pin extended outwards therefrom, and the negative pins of the capacitor units are combined to form a negative pin unit or divided into a plurality of negative pin units. Whereby when the negative pins of the capacitor units are divided into the negative pin units, the negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other. The substrate unit has a positive guiding substrate electrically connected to the positive pins of the capacitor units and a negative guiding substrate electrically connected to the negative pins of the capacitor units. The package unit covers the capacitor units and one part of the substrate unit.

To achieve the above-mentioned objectives, the present invention provides a stacked solid electrolytic capacitor with multi-pin structure, including: a capacitor unit, a substrate unit and a package unit. The capacitor unit has a plurality of positive electrodes and a plurality of negative electrodes. Each positive electrode has a positive pin extended outwards therefrom, the positive pins of the capacitor units are divided into a plurality of positive pin units that are separated from each other, the positive pins of each positive pin unit are electrically stacked onto each other, each negative electrode has a negative pin extended outwards therefrom, and the negative pins of the capacitor units are combined to form a negative pin unit or divided into a plurality of negative pin units. Whereby when the negative pins are divided into the negative pin units, the negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other. The substrate unit has a positive guiding substrate electrically connected to the positive pins of the capacitor units and a negative guiding substrate electrically connected to the negative pins of the capacitor units. The package unit covers the capacitor units and one part of the substrate unit.

Therefore, the present invention has a plurality of positive pins being extended from the positive electrodes of the capacitor units along the same direction and/or different directions and being electrically stacked onto each other by soldering, so that the soldering difficulty and the ESR (Equivalent Series Resistance) are decreased.

In order to further understand the techniques, means and effects the present invention takes for achieving the prescribed objectives, the following detailed descriptions and appended drawings are hereby referred, such that, through which, the purposes, features and aspects of the present invention can be thoroughly and concretely appreciated; however, the appended drawings are merely provided for reference and illustration, without any intention to be used for limiting the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the first embodiment of the present invention;

FIG. 2 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the second embodiment of the present invention;

FIG. 3 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the third embodiment of the present invention;

FIG. 4 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the fourth embodiment of the present invention;

FIG. 5 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the fifth embodiment of the present invention;

FIG. 5A is a top, schematic view of the resin body installed on an edge of the positive foil according to the fifth embodiment of the present invention;

FIG. 5B is an exploded, schematic view along line 5B-5B of FIG. 5A;

FIG. 6 is a schematic view of the stacked solid electrolytic capacitor using a first stack method according to the present invention;

FIG. 7 is a schematic view of the stacked solid electrolytic capacitor using a second stack method according to the present invention;

FIG. 8 is a schematic view of the stacked solid electrolytic capacitor using a third stack method according to the present invention;

FIG. 9 is a schematic view of the stacked solid electrolytic capacitor using a fourth stack method according to the present invention;

FIG. 10 is a schematic view of the stacked solid electrolytic capacitor using a fifth stack method according to the present invention;

FIG. 11 is a schematic view of the stacked solid electrolytic capacitor using a sixth stack method according to the present invention;

FIG. 12 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the sixth embodiment of the present invention; and

FIG. 13 is a lateral, schematic view of the stacked solid electrolytic capacitor according to the seventh embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 1, the first embodiment of the present invention provides a stacked solid electrolytic capacitor (chip capacitor) with multi-pin structure, including: a plurality of capacitor units 1 a, a substrate unit 2 a and a package unit 3 a. Every two capacitor units 1 a are electrically stacked onto each other by a conductive layer Sa such as silver glue or silver paste.

Each capacitor unit 1 a is composed of a carbon glue layer (negative electrode) 10 a, a conductive polymer layer 11 a, a valve metal foil (positive electrode) 12 a, a conductive polymer layer 11 a and a carbon glue layer (negative electrode) 11 a that are stacked onto each other in sequence. Each valve metal foil 12 a has an oxide layer (not shown) on its outer surface, and the oxide layer can be a dielectric layer to generate insulation effect. The two conductive polymer layers 11 a of each capacitor unit 1 a are formed on two opposite surface of the corresponding valve metal foil 12 a. In addition, the first embodiment further includes a plurality of conductive layers 5 a, and the carbon glue layers 10 a of each capacitor unit 1 a are electrically connected to each other by each conductive layer 5 a.

Moreover, the positive electrodes of the valve metal foils 12 a of the capacitor units 1 a are electrically connected to each other by soldering Pa. The carbon glue layers 10 a of each capacitor unit 1 a are electrically connected to each other by the conductive layer 5 a, and the valve metal foils 12 a and the carbon glue layers 10 a are insulated from each other. In addition, each capacitor unit 1 a has a plurality of insulating layers 4 a, and each insulating layer 4 a is disposed around one part of an external surface of each valve metal foil 12 a in order to limit the lengths of the conductive polymer layers 11 a and the carbon glue layers 10 a. In other words, each insulating layer 4 a is disposed around one part of a top, a bottom, a left and a right surfaces of each valve metal foil 12 a. Each insulating layer 4 a can be an insulating line between the positive electrode and the negative electrode of the each capacitor unit 1 a.

Furthermore, the substrate unit 2 a has a positive guiding substrate 21 a electrically connected to the valve metal foils 12 a of the capacitor units 1 a and a negative guiding substrate 22 a electrically connected to the carbon glue layers 10 a of the capacitor units 1 a. In addition, the package unit 3 a covers the capacitor units 1 a and one part of the substrate unit 2 a.

In addition, referring to FIG. 2, the second embodiment of the present invention provides a stacked solid electrolytic capacitor (chip capacitor) with multi-pin structure, including: a plurality of capacitor units 1 b, a substrate unit 2 b and a package unit 3 b. Each capacitor unit 1 b is composed of a carbon glue layer (negative electrode) 10 b, a conductive polymer layer 11 b, a valve metal foil (positive electrode) 12 b, a conductive polymer layer 11 b and a carbon glue layer (negative electrode) 11 b that are stacked onto each other in sequence. Each valve metal foil 12 b has an oxide layer (not shown) on its outer surface, and the oxide layer can be a dielectric layer to generate insulation effect. The two conductive polymer layers 11 b of each capacitor unit 1 b are formed on two opposite surface of the corresponding valve metal foil 12 b. Every two capacitor units 1 b are electrically connected to each other by the carbon glue layer 10 b. In addition, the second embodiment further includes a plurality of conductive layers 5 b, and the carbon glue layers 10 b of each capacitor unit 1 b are electrically connected to each other by each the conductive layer 5 b.

Moreover, the positive electrodes of the valve metal foils 12 b of the capacitor units 1 b are electrically connected to each other by soldering Pb. The carbon glue layers 10 b of each capacitor unit 1 b are electrically connected to each other by the conductive layer 5 b, and the valve metal foils 12 b and the carbon glue layers 10 b are insulated from each other. In addition, each capacitor unit 1 b has a plurality of insulating layers 4 b, and each insulating layer 4 b is disposed around one part of an external surface of each valve metal foil 12 b in order to limit the lengths of the conductive polymer layers 11 b and the carbon glue layers 10 b. In other words, each insulating layer 4 b is disposed around one part of a top, a bottom, a left and a right surfaces of each valve metal foil 12 b. Each insulating layer 4 b can be an insulating line between the positive electrode and the negative electrode of the each capacitor unit 1 b.

Furthermore, the substrate unit 2 b has a positive guiding substrate 21 b electrically connected to the valve metal foils 12 b of the capacitor units 1 b and a negative guiding substrate 22 b electrically connected to the carbon glue layers 10 b of the capacitor units 1 b. In addition, the package unit 3 b covers the capacitor units 1 b and one part of the substrate unit 2 b.

Referring to FIG. 3, the third embodiment of the present invention provides a stacked solid electrolytic capacitor (chip capacitor) with multi-pin structure, including: a plurality of capacitor units 1 c, a substrate unit 2 c and a package unit 3 c. Every two capacitor units 1 c are electrically stacked onto each other by a conductive layer Sc such as silver glue or silver paste.

Each capacitor unit 1 c is composed of a negative foil (negative electrode) 100 c, an isolation paper 110 c with conductive polymer substance, a positive foil (positive electrode) 12 c, an isolation paper 111 c with conductive polymer substance and a negative foil (negative electrode) 101 c that are alternatively stacked onto each other. Each positive foil 12 c has an oxide layer (not shown) on its outer surface, and the oxide layer can be a dielectric layer to generate insulation effect. The two isolation paper (110 c, 101 c) of each capacitor unit 1 c are integrated to form a U-shaped isolation paper 11 c in order to cover one part of the positive foils 12 c of each capacitor unit 1 c, and the two negative foils (100 c, 101 c) of each capacitor unit 1 c are integrated to form a U-shaped negative foil 10 c in order to cover the U-shaped isolation paper 11 c of each capacitor unit 1 c.

Moreover, the positive electrodes of the positive foils 12 c of the capacitor units 1 c are electrically connected to each other by soldering Pc. The two negative foils (100 c, 101 c) of each capacitor unit 1 c are electrically connected to each other, and the positive foils 12 c and the two negative foils (100 c, 101 c) are insulated from each other. In addition, each capacitor unit 1 c has a plurality of insulating layers 4 c, and each insulating layer 4 c is disposed around one part of an external surface of each positive foil 12 c in order to limit the lengths of the negative foils (100 c, 101 c) and the isolation paper (110 c, 111 c). In other words, each insulating layer 4 c is disposed around one part of a top, a bottom, a left and a right surfaces of each positive foil 12 c. Each insulating layer 4 c can be an insulating line between the positive electrode and the negative electrode of the each capacitor unit 1 c.

Furthermore, the substrate unit 2 c has a positive guiding substrate 21 c electrically connected to the positive foils 12 c of the capacitor units 1 c and a negative guiding substrate 22 c electrically connected to the negative foils (100 c, 101 c) of the capacitor units 1 c. The substrate unit 2 c can be disposed a center position (as shown in FIG. 3), a bottom position or any position of the capacitor units 1 c. In addition, the package unit 3 c covers the capacitor units 1 c and one part of the substrate unit 2 c. In other words, one part of the positive guiding substrate 21 c and one part of the negative guiding substrate 22 c are exposed and bent downwards to form two conductive pins.

Referring to FIG. 4, the fourth embodiment of the present invention provides a stacked solid electrolytic capacitor (chip capacitor) with multi-pin structure, including: a plurality of capacitor units 1 d, a substrate unit 2 d and a package unit 3 d. Every two capacitor units 1 d are electrically stacked onto each other by a conductive layer Sd such as silver glue or silver paste.

Each capacitor unit 1 d is composed of a negative foils (negative electrodes) 100 d, an isolation paper 110 d with conductive polymer substance, a positive foils (positive electrodes) 12 d, an isolation paper 111 d with conductive polymer substance and a negative foils (negative electrodes) 101 d that are stacked onto each other. Each positive foil 12 d has an oxide layer (not shown) on its outer surface, and the oxide layer can be a dielectric layer to generate insulation effect. In addition, the fourth embodiment further includes a plurality of conductive layers 5 d. Each conductive layer 5 d is electrically connected between the two negative foils (100 d, 101 d) of each capacitor unit 1 d, and the lengths of two same ends of two negative foils (100 d, 101 d) of each capacitor unit 1 d are larger than the length of one end of the positive foil 12 d of each capacitor unit 1 d in order to prevent the positive foils 12 d touching the conductive layers 5 d.

Moreover, the positive electrodes of the positive foils 12 d of the capacitor units 1 d are electrically connected to each other by soldering Pd. The two negative foils (100 d, 101 d) of each capacitor unit 1 d are electrically connected to each other by the conductive layers 5 d, and the positive foils 12 d and the two negative foils (100 d, 101 d) are insulated from each other. In addition, each capacitor unit 1 d has a plurality of insulating layers 4 d, and each insulating layer 4 d is disposed around one part of an external surface of each positive foil 12 d in order to limit the lengths of the negative foils (100 d, 101 d) and the isolation paper (110 d, 111 d). In other words, each insulating layer 4 d is disposed around one part of a top, a bottom, a left and a right surfaces of each positive foil 12 d. Each insulating layer 4 d can be an insulating line between the positive electrode and the negative electrode of the each capacitor unit 1 d.

Furthermore, the substrate unit 2 d has a positive guiding substrate 21 d electrically connected to the positive foils 12 d of the capacitor units 1 d and a negative guiding substrate 22 d electrically connected to the negative foils (100 d, 101 d) of the capacitor units 1 d. In addition, the package unit 3 d covers the capacitor units 1 d and one part of the substrate unit 2 d.

Referring to FIGS. 5, 5A and 5B, the fifth embodiment of the present invention provides a stacked solid electrolytic capacitor (chip capacitor) with multi-pin structure, including: a capacitor unit 1 e, a substrate unit 2 e and a package unit 3 e.

The capacitor unit 1 e is composed of a plurality of negative foils (negative electrodes) 10 e, a plurality of isolation paper 11 e with conductive polymer substance and a plurality of positive foils (positive electrodes) 12 e that are alternatively stacked onto each other. Each isolation paper 11 e is disposed between each positive foil 12 e and each negative foil 10 e. The positive sides of the positive foils 12 e are electrically connected to each other by soldering Pe, the negative foils 10 e are electrically connected to each other by a conductive layer 5 e, and the positive foils 12 e and the negative foils 10 e are insulated from each other. In addition, each positive foil 12 e has a resin body 120 e (as shown in FIGS. 5A and 5B) selectively installed on an edge thereof, and each negative foil 10 e also has a resin body (not shown) selectively installed on an edge thereof, in order to decrease the LC (Leakage Current) and the phenomenon of the short circuit. Of course, the resin body can be selectively installed on an edge of each positive foil and each negative foil or the negative electrode side of each valve metal foil in the other embodiments of the present invention.

Furthermore, the substrate unit 2 e has a positive guiding substrate 21 e electrically connected to the positive foils 12 e and a negative guiding substrate 22 e electrically connected to the negative foils 10 e by the conductive layer Se. In addition, the package unit 3 e covers the capacitor units 1 e and one part of the substrate unit 2 e.

In addition, each capacitor unit 1 e has a plurality of insulating layers 4 e, and each insulating layer 4 e is disposed around one part of an external surface of each positive foil 12 e in order to limit the lengths of the negative foils 10 e and the isolation paper 11 e. In other words, each insulating layer 4 e is disposed around one part of a top, a bottom, a left and a right surfaces of each positive foil 12 e. Each insulating layer 4 e can be an insulating line between the positive electrode and the negative electrode of the each capacitor unit 1 e. Moreover, the conductive layer 5 e is electrically connected one end of the negative foils 10 e, and the length of the end of each negative foil 10 e is larger than the length of one end of each positive foil 12 e in order to prevent the positive foils 12 e touching the conductive layer 5 e.

The above-mentioned embodiments can use the following different aspects:

Referring to FIGS. 6 and 7 (multi positive extending sides along the same direction and one negative extending side), each capacitor unit 1 has a positive electrode 12 that has a positive pin 120 extended outwards therefrom. The positive pins 120 of the capacitor units 1 are divided into a plurality of positive pin units 120′ that are separated from each other (FIG. 6 discloses two sets of positive pin units 120′, FIG. 7 discloses three sets of positive pin units 120′), and the positive pins 120 of each positive pin unit 120′ are electrically stacked onto each other. The positive pins 120 are respectively extended outwards from the positive electrodes 12 along the same direction. Only four layers of soldering can achieve eight layers of stacking as showing in FIG. 6, and only four layers of soldering can achieve twelve layers of stacking as showing in FIG. 7. In addition, the negative electrodes (not shown) of the capacitor units 1 are electrically stacked onto each other by the conductive layers.

Referring to FIGS. 8 and 9 (multi positive extending sides along different directions and one negative extending side), each capacitor unit 1 has a positive electrode 12 that has a positive pin 120 extended outwards therefrom. The positive pins 120 of the capacitor units 1 are divided into a plurality of positive pin units 120′ that are separated from each other (FIG. 8 discloses two sets of positive pin units 120′, FIG. 9 discloses four sets of positive pin units 120′), and the positive pins 120 of each positive pin unit 120′ are electrically stacked onto each other. The positive pins 120 are respectively extended outwards from the positive electrodes 12 along different directions. In addition, the negative electrodes (not shown) of the capacitor units 1 are electrically stacked onto each other by the conductive layers.

In other words, referring to FIGS. 6-9, the positive foil 12 of each capacitor unit has a positive pin 120 extended outwards therefrom. The positive pins 120 of the capacitor units 1 are divided into a plurality of positive pin units 120′ that are separated from each other, and the positive pins 120 of each positive pin unit 120′ are electrically stacked onto each other. In addition, the negative electrode (not shown) of each capacitor unit 1 has a negative pin (not shown) extended outwards therefrom, and the negative pins of the capacitor units 1 are combined to form a negative pin unit in order to make the negative pins electrically stacked onto each other. Moreover, the positive pins 120 are selectively respectively extended outwards from the positive electrodes 12 along the same direction (as shown in FIGS. 6-7) or different directions (as shown in FIGS. 8-9), and the negative pins are respectively extended outwards from the negative electrodes along the same direction (it means that the whole negative pins of the negative electrodes are electrically stacked onto each other).

Of course, the positive electrodes can be electrically stacked onto each other and the negative pins (not shown) can be selectively respectively extended outwards from the negative electrodes along the same direction (to form one positive extending side and multi negative extending sides along the same direction) or different directions (to form one positive extending side and multi negative extending sides along different directions). For example, the positive electrode of each capacitor unit has a positive pin extended outwards therefrom, and the positive pins are combined to form a positive pin unit in order to make the positive pins electrically stacked onto each other. The negative electrode of each capacitor unit has a negative pin extended outwards therefrom. The negative pins of the capacitor units are divided into the negative pin units, and the negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other. In addition, the positive pins are respectively extended outwards from the positive electrodes along the same direction, and the negative pins are selectively respectively extended outwards from the negative electrodes along the same direction or different directions.

Referring to FIGS. 10 and 11 (multi positive extending sides along the same direction and multi negative extending sides along the same direction), each capacitor unit 1 has a positive electrode 12 that has a positive pin 120 extended outwards therefrom. The positive pins 120 of the capacitor units 1 are divided into a plurality of positive pin units 120′ that are separated from each other (FIG. 10 discloses two sets of positive pin units 120′, FIG. 11 discloses three sets of positive pin units 120′), and the positive pins 120 of each positive pin unit 120′ are electrically stacked onto each other. Each capacitor unit 1 has a negative electrode 10 that has a negative pin 100 extended outwards therefrom. The negative pins 100 of the capacitor units 1 are divided into a plurality of negative pin units 100′ that are separated from each other (FIG. 10 discloses two sets of negative pin units 100′, FIG. 11 discloses three sets of negative pin units 100′), and the negative pins 100 of each negative pin unit 100′ are electrically stacked onto each other. The positive pins 120 are respectively extended outwards from the positive electrodes 12 along the same direction, and the negative pins 100 are respectively extended outwards from the negative electrodes 10 along the same direction. Only four layers of soldering can achieve eight layers of stacking as showing in FIG. 10, and only four layers of soldering can achieve twelve layers of stacking as showing in FIG. 11.

Of course, the aspect of FIGS. 10 and 11 can be changed into multi positive extending sides along different directions and multi negative extending sides along different directions. For example, each capacitor unit 1 has a positive electrode 12 that has a positive pin 120 extended outwards therefrom. The positive pins 120 of the capacitor units 1 are divided into a plurality of positive pin units 120′ that are separated from each other, and the positive pins 120 of each positive pin unit 120′ are electrically stacked onto each other. Each capacitor unit 1 has a negative electrode 10 that has a negative pin 100 extended outwards therefrom. The negative pins 100 of the capacitor units 1 are divided into a plurality of negative pin units 100′ that are separated from each other, and the negative pins 100 of each negative pin unit 100′ are electrically stacked onto each other. The positive pins 120 are respectively extended outwards from the positive electrodes 12 along the same direction (as shown in FIGS. 10 and 11) or the different directions, and the negative pins 100 are respectively extended outwards from the negative electrodes 10 along the same direction (as shown in FIGS. 10 and 11) or the different directions.

Therefore, the present invention provides many separate positive pins and/or many separate negative pins. In other words, the present invention can use the separate positive pins and the separate negative pins to execute soldering process (as shown in FIGS. 10 and 11). The present invention also can use the separate positive pins (as shown in FIGS. 6-9) to mate with concentrated negative pins or use the separate negative pins to mate with concentrated positive pins.

The above-mentioned embodiments of the present invention can use the above-mentioned different aspects. For example, the positive electrodes (12 a, 12 b, 12 c, 12 d, 12 e) of the capacitor units (1 a, 1 b, 1 c, 1 d, 1 e) are electrically connected to each other and respectively electrically connected to the positive pins 120. The negative electrodes (10 a, 10 b, 10 c, 10 d, and 10 e) of the capacitor units (1 a, 1 b, 1 c, 1 d, 1 e) are electrically connected to each other and respectively electrically connected to the negative pins 100.

Hence, user can choose one of the five embodiments to mate with one of the six aspects according to different requirements in order to finish the stacked solid electrolytic capacitor of the present invention.

Referring to FIG. 12, the sixth embodiment of the present invention provides a plurality of assistance conductive blocks 6 f. Each assistance conductive block 6 f is electrically disposed between the two positive electrodes 12 f of every two capacitor units 1 f and extended outwards, and the assistance conductive blocks 6 f are electrically connected to the positive guiding substrate 21 f by soldering Pf. For example, the positive electrodes 12 f are electrically connected to the positive guiding substrate 21 f (as shown in FIGS. 1-5) in series by the assistance conductive blocks 6 f.

Referring to FIG. 13, the seventh embodiment of the present invention provides a plurality of assistance conductive blocks 6 g. Each assistance conductive block 6 g is electrically disposed between the two positive electrodes 12 g of every two capacitor units 1 g and extended outwards, and the assistance conductive blocks 6 g are electrically connected to the positive guiding substrate 21 g by soldering Pg. For example, the positive electrodes 12 g are electrically connected to the positive guiding substrate 21 g (as shown in FIGS. 6-7) in parallel by the assistance conductive blocks 6 g.

In conclusion, the present invention has a plurality of positive pins being extended from the positive electrodes of the capacitor units along the same direction and/or different directions and being electrically stacked onto each other by soldering, so that the soldering difficulty and the ESR (Equivalent Series Resistance) are decreased.

The above-mentioned descriptions represent merely the preferred embodiment of the present invention, without any intention to limit the scope of the present invention thereto. Various equivalent changes, alternations or modifications based on the claims of present invention are all consequently viewed as being embraced by the scope of the present invention. 

1. A stacked solid electrolytic capacitor with multi-pin structure, comprising: a plurality of capacitor units, wherein each capacitor unit has a positive electrode that has a positive pin extended outwards therefrom, the positive pins of the capacitor units are divided into a plurality of positive pin units that are separated from each other, and the positive pins of each positive pin unit are electrically stacked onto each other, wherein each capacitor unit has a negative electrode that has a negative pin extended outwards therefrom, and the negative pins of the capacitor units are combined to form a negative pin unit or divided into a plurality of negative pin units, whereby when the negative pins of the capacitor units are divided into the negative pin units, the negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other; a substrate unit having a positive guiding substrate electrically connected to the positive pins of the capacitor units and a negative guiding substrate electrically connected to the negative pins of the capacitor units; and a package unit covering the capacitor units and one part of the substrate unit.
 2. The stacked solid electrolytic capacitor according to claim 1, wherein each capacitor unit is composed of a carbon glue layer, a conductive polymer layer, a valve metal foil, a conductive polymer layer and a carbon glue layer that are stacked onto each other in sequence, every two capacitor units are electrically stacked onto each other by silver glue or silver paste, the positive electrodes of the capacitor units are electrically connected to each other by soldering and respectively electrically connected to the positive pins, the carbon glue layers of each capacitor unit are electrically connected to each other by a conductive layer, the carbon glue layers of the capacitor units are electrically connected to each other by the silver glue or the silver paste and respectively electrically connected to the negative pins, and the positive electrodes and the carbon glue layers are insulated from each other.
 3. The stacked solid electrolytic capacitor according to claim 1, wherein each capacitor unit is composed of a carbon glue layer, a conductive polymer layer, a valve metal foil, a conductive polymer layer and a carbon glue layer that are stacked onto each other in sequence, every two capacitor units are electrically stacked onto each other by the carbon glue layer, the positive electrodes of the capacitor units are electrically connected to each other by soldering and respectively electrically connected to the positive pins, the carbon glue layers of each capacitor unit are electrically connected to each other by a conductive layer and respectively electrically connected to the negative pins, and the positive electrodes and the carbon glue layers are insulated from each other.
 4. The stacked solid electrolytic capacitor according to claim 2, wherein each valve metal foil has a resin body selectively installed on an edge of a negative side thereof.
 5. The stacked solid electrolytic capacitor according to claim 2, wherein each capacitor unit has a plurality of insulating layers, and each insulating layer is disposed around one part of an external surface of each valve metal foil in order to limit the lengths of the conductive polymer layers and the carbon glue layers.
 6. The stacked solid electrolytic capacitor according to claim 2, wherein the positive pins are respectively extended outwards from the positive electrodes along the same direction, and the negative pins are respectively extended outwards from the negative electrodes along the same direction.
 7. The stacked solid electrolytic capacitor according to claim 2, wherein the positive pins are selectively respectively extended outwards from the positive electrodes along the same direction or different directions, and the negative pins are selectively respectively extended outwards from the negative electrodes along the same direction or different directions.
 8. The stacked solid electrolytic capacitor according to claim 2, further comprising: a plurality of assistance conductive blocks, wherein each assistance conductive block is electrically disposed between the two positive electrodes of every two capacitor units and extended outwards, and the assistance conductive blocks are electrically connected to the positive guiding substrate by soldering.
 9. The stacked solid electrolytic capacitor according to claim 3, wherein each valve metal foil has a resin body selectively installed on an edge of a negative side thereof.
 10. The stacked solid electrolytic capacitor according to claim 3, wherein each capacitor unit has a plurality of insulating layers, and each insulating layer is disposed around one part of an external surface of each valve metal foil in order to limit the lengths of the conductive polymer layers and the carbon glue layers.
 11. The stacked solid electrolytic capacitor according to claim 3, wherein the positive pins are respectively extended outwards from the positive electrodes along the same direction, and the negative pins are respectively extended outwards from the negative electrodes along the same direction.
 12. The stacked solid electrolytic capacitor according to claim 3, wherein the positive pins are selectively respectively extended outwards from the positive electrodes along the same direction or different directions, and the negative pins are selectively respectively extended outwards from the negative electrodes along the same direction or different directions.
 13. The stacked solid electrolytic capacitor according to claim 3, further comprising: a plurality of assistance conductive blocks, wherein each assistance conductive block is electrically disposed between the two positive electrodes of every two capacitor units and extended outwards, and the assistance conductive blocks are electrically connected to the positive guiding substrate by soldering.
 14. The stacked solid electrolytic capacitor according to claim 1, wherein each capacitor unit is composed of a negative foil, an isolation paper with conductive polymer substance, a positive foil, an isolation paper with conductive polymer substance and a negative foil that are stacked onto each other in sequence, the positive foils of the capacitor units are electrically connected to each other and respectively electrically connected to the positive pins, the negative foils of the capacitor units are electrically connected to each other and respectively electrically connected to the negative pins, and the positive foils and the negative foils are insulated from each other.
 15. The stacked solid electrolytic capacitor according to claim 14, wherein every two capacitor units are electrically stacked onto each other by silver glue or silver paste.
 16. The stacked solid electrolytic capacitor according to claim 14, wherein each positive foil has a resin body selectively installed on an edge thereof, and each negative foil has a resin body selectively installed on an edge thereof.
 17. The stacked solid electrolytic capacitor according to claim 14, wherein the two isolation paper of each capacitor unit are integrated to form a U-shaped isolation paper in order to cover one part of the positive foils of each capacitor unit, and the two negative foils of each capacitor unit are integrated to form a U-shaped negative foil in order to cover the U-shaped isolation paper of each capacitor unit.
 18. The stacked solid electrolytic capacitor according to claim 14, further comprising: a plurality of conductive layers, wherein each conductive layer is electrically connected between the two negative foils of each capacitor unit, and the lengths of two same ends of two negative foils of each capacitor unit are larger than the length of one end of the positive foil of each capacitor unit in order to prevent the positive foils touching the conductive layers.
 19. The stacked solid electrolytic capacitor according to claim 14, wherein each capacitor unit has a plurality of insulating layers, and each insulating layer is disposed around one part of an external surface of each positive foil in order to limit the lengths of the negative foils and the isolation paper.
 20. A stacked solid electrolytic capacitor with multi-pin structure, comprising: a capacitor unit having a plurality of positive electrodes and a plurality of negative electrodes, wherein each positive electrode has a positive pin extended outwards therefrom, the positive pins of the capacitor units are divided into a plurality of positive pin units that are separated from each other, the positive pins of each positive pin unit are electrically stacked onto each other, each negative electrode has a negative pin extended outwards therefrom, and the negative pins of the capacitor units are combined to form a negative pin unit or divided into a plurality of negative pin units, whereby when the negative pins are divided into the negative pin units, the negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other; a substrate unit having a positive guiding substrate electrically connected to the positive pins of the capacitor units and a negative guiding substrate electrically connected to the negative pins of the capacitor units; and a package unit covering the capacitor units and one part of the substrate unit.
 21. The stacked solid electrolytic capacitor according to claim 20, wherein the capacitor unit is composed of a plurality of negative foils, a plurality of isolation paper with conductive polymer substance and a plurality of positive foils that are alternatively stacked onto each other, wherein each isolation paper is disposed between each positive foil and each negative foil, the positive foils are electrically connected to each other and respectively electrically connected to the positive pins, the negative foils are electrically connected to each other and respectively electrically connected to the negative pins, and the positive foils and the negative foils are insulated from each other.
 22. The stacked solid electrolytic capacitor according to claim 21, wherein each positive foil has a resin body selectively installed on an edge thereof, and each negative foil has a resin body selectively installed on an edge thereof.
 23. The stacked solid electrolytic capacitor according to claim 21 further comprising: a conductive layer electrically connected one end of the negative foils, and the length of the end of each negative foil is larger than the length of one end of each positive foil in order to prevent the positive foils touching the conductive layer.
 24. The stacked solid electrolytic capacitor according to claim 21, wherein each capacitor unit has a plurality of insulating layers, and each insulating layer is disposed around one part of an external surface of each positive foil in order to limit the lengths of the negative foils and the isolation paper.
 25. The stacked solid electrolytic capacitor according to claim 21, wherein the positive pins are respectively extended outwards from the positive electrodes along the same direction, and the negative pins are respectively extended outwards from the negative electrodes along the same direction.
 26. The stacked solid electrolytic capacitor according to claim 21, wherein the positive pins are selectively respectively extended outwards from the positive electrodes along the same direction or different directions, and the negative pins are selectively respectively extended outwards from the negative electrodes along the same direction or different directions. 